Finding the Fourth Proportional to 123,119.66, 169,905.71 and 72,141.46

Step by Step Solution

1. Step 1: Write the proportion equation
   123,119.66 : 169,905.71 = 72,141.46 : x
2. Step 2: Convert to fraction form
   123,119.66/169,905.71 = 72,141.46/x
3. Step 3: Cross multiply
   123,119.66x = 169,905.71 × 72,141.46
4. Step 4: Simplify right side
   123,119.66x = 12,257,245,981.74
5. Step 5: Solve for x
   x = 12,257,245,981.74/123,119.66
6. Step 6: Final answer
   x = 99,555.55